I spent the whole afternoon yesterday cleaning our guest room/office that has the computer in it. We dust in there about every other week but the areas behind the computer, under the desk, etc. were thick with dust because we don't normally get behind them. This concerns me because dust is really hard on the electrical components. I have a standard air filter in the furnace but with two boys, two dogs, and a dusty climate it's tough to keep 2000 square feet dust free. I have heard about some of the electrostatic air cleaners but I need some advice on the subject.